/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.apis.graphics;

import android.content.Context;
import android.graphics.*;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;

public class Sweep extends GraphicsActivity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(new SampleView(this));
	}

	private static class SampleView extends View {
		private Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
		private float mRotate;
		private Matrix mMatrix = new Matrix();
		private Shader mShader;
		private boolean mDoTiming;

		public SampleView(Context context) {
			super(context);
			setFocusable(true);
			setFocusableInTouchMode(true);

			float x = 160;
			float y = 100;
			mShader = new SweepGradient(x, y, new int[] { Color.GREEN,
					Color.RED, Color.BLUE, Color.GREEN }, null);
			mPaint.setShader(mShader);
		}

		@Override
		protected void onDraw(Canvas canvas) {
			Paint paint = mPaint;
			float x = 160;
			float y = 100;

			canvas.drawColor(Color.WHITE);

			mMatrix.setRotate(mRotate, x, y);
			mShader.setLocalMatrix(mMatrix);
			mRotate += 3;
			if (mRotate >= 360) {
				mRotate = 0;
			}
			invalidate();

			if (mDoTiming) {
				long now = System.currentTimeMillis();
				for (int i = 0; i < 20; i++) {
					canvas.drawCircle(x, y, 80, paint);
				}
				now = System.currentTimeMillis() - now;
				android.util.Log.d("skia", "sweep ms = " + (now / 20.));
			} else {
				canvas.drawCircle(x, y, 80, paint);
			}
		}

		@Override
		public boolean onKeyDown(int keyCode, KeyEvent event) {
			switch (keyCode) {
			case KeyEvent.KEYCODE_D:
				mPaint.setDither(!mPaint.isDither());
				invalidate();
				return true;
			case KeyEvent.KEYCODE_T:
				mDoTiming = !mDoTiming;
				invalidate();
				return true;
			}
			return super.onKeyDown(keyCode, event);
		}
	}
}
